Host Environment

• OS: Windows
• Compiler: revision

To Reproduce
Steps to reproduce the behavior:
./vcpkg install zlib:x64-windows

Failure logs
CMake Error at scripts/cmake/vcpkg_execute_required_process.cmake:72 (message):
Command failed: C:/dev/vcpkg/downloads/tools/msys2/msys64/usr/bin/bash.exe --noprofile --norc -c "pacman -S --noconfirm --needed pkg-config"
Working Directory: C:/dev/vcpkg/downloads/tools/msys2
Error code: 1
See logs for more information:
C:\dev\vcpkg\buildtrees\zlib\msys-pacman-x64-windows-err.log

Call Stack (most recent call first):
scripts/cmake/vcpkg_acquire_msys.cmake:127 (vcpkg_execute_required_process)
scripts/cmake/vcpkg_fixup_pkgconfig.cmake:281 (vcpkg_acquire_msys)
ports/zlib/portfile.cmake:46 (vcpkg_fixup_pkgconfig)
scripts/ports.cmake:79 (include)

Error: Building package zlib:x64-windows failed with: BUILD_FAILED
Please ensure you're using the latest portfiles with .\vcpkg update, then
submit an issue at https://github.com/Microsoft/vcpkg/issues including:
Package: zlib:x64-windows
Vcpkg version: 2020.06.15-nohash